Chinese dominoes are called "Gu pai" in Mardarin which stand for tiles made of animal bones that used in old casinoes. You may find guys playing these tiles in some 1990s' Hongkong costume films. In Pic 1 I labeled these tiles with Chinese, Mardarin pronunciation and English translation(which varies from different versions). You can find more details on wikipedia:
https://en.wikipedia.org/wiki/Chinese_dominoes
You need to print "Wenpai" twice and "Wupai" once to put a set together. Otherwise you print the assembly one which perhaps need to be resized to adjust to your printer.